After Effects Render Engine across multiple computers

I want to build a render farm for After Effects using multiple computer, my plan is to have 8 computers for my render farm since AE does not support multithread, and render TIFF sequences out of those.

I was wondering if there is a way to make this process somehow "smart" by rendering more than one project at the same time when required, for example.

-An animator save a project in the watch folder and it will take 5 hours to render across all 8 computers (project 1), an hour later another animator exports a quick sequence that would take 20 minutes (project 2). I don't want do set a specific number of machines to render from before start rendering because I never know when a new render is coming to the queue. What I want AE to do is render project 1 using 4 computers and the project 2 using the remaining 4 once the second project is added. Prior to that all computer would be rendering project 1 and after project 2 is completed all 8 computers would go back to rendering project 1.